<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="test"></div>
	
	<!-- 引入react核心库 -->
	<script type="text/javascript" src="../js/react.development.js"></script>
	<!-- 引入react-dom，用于支持react操作DOM -->
	<script type="text/javascript" src="../js/react-dom.development.js"></script>
	<!-- 引入babel，用于将jsx转为js -->
	<script type="text/javascript" src="../js/babel.min.js"></script>
	<!-- 引入prop-types，用于对组件标签属性进行限制 -->
	<script type="text/javascript" src="../js/prop-types.js"></script>

	<script type="text/babel">
        class Life extends React.Component{
            state={opacity:1};

            death = ()=>{
                ReactDOM.unmountComponentAtNode(document.getElementById('test'));
            }
            //组件挂载完毕
            componentDidMount(){
                this.timer = setInterval(()=>{
                    let {opacity} =this.state;
                    opacity -= 0.1;
                    if(opacity <= 0) opacity = 1;
                    this.setState({opacity:opacity})
                },200)
            }
            //组件将要卸载
            componentWillUnmount(){
                clearInterval(this.timer);
            }

            render(){
                return (
                    <div>
                        <h1 style={{opacity:this.state.opacity}}>React学不会怎么办</h1>
                        <button onClick={this.death}>不活了</button>
                    </div>
                )
            }
        }
        ReactDOM.render(<Life />,document.getElementById('test'))
    </script>
</body>
</html>